figure i would post some schematics of the backwards joule thief..
Thank you Kooler!
Great, I will make some test and measurements with your backward Joule Thief.
Could you please give an indication of the capacitor value and the tune-able resistor value you recommend?
In the circuit on the right (the one with the air core):
- I would put at least 40 turns on a 50 mm (2" inch) air core to come close to 100µH?
- And according to your teaching, there should be a third inductance between the collector (of the transistor) and the + pole (of the battery)?
I guess the three circuits are all for very low voltage batteries (0,5 Volt and even 0,25 Volt)?
Greetings, Conrad
Hi Robbie (Kooler)!
Because I am thinking about implementing your BJT and because I like air core coils, further questions concerning the circuit on the right side (the one with the air core):
The two windings 30 turns and 20 turns (air core), are they
- on two separate cores (two independent coils),
- bifilar,
- two windings one after the other on a single air core,
- wound (connected) in an counter-wound fashion?
Greetings, Conrad
the below pic is the same as above.. (i fix the diagram above also..)
it has 104k cap 100,000pf= 0.1 uf
10k resistor
mpsa06 transistor amp draw = 7.8ma's at 0.9 volts
sorry but i fix the aircoil bjt .. this time it is right..
Nice one Kooler, I'm working on my version of your BJT event thought at this point it is a lot different and more designed as a oscillator. I need to run a few more tests to see if it can last the night without draining the cap I'm using and then I will finish it. Any new news on your VTA?
stprue
i haven't had a chance to get down to my makeshift workshop..
i just been posting some old stuff..
but i will update you as soon as i get down to the foxhole.. hoping very soon
robbie
Sounds good, hope the back is healing up!
Hi robbie,
Thanks for starting this thread.
I see by your corrected drawing that you have added only one inductor at the negative side of the battery.
Is this right?
I am interpreting the 20T and 30T inductors that branch out from the collector to be the usual bifilar coil of the jtc.
So, did you change this?
[I saw earlier that you said there was a 100uH inductor on each side of the battery. I guess you were counting one half of the bifilar as the pos inductor.]
I want clarification please.
Thanks so much... this is terrific,
jeanna
jeanna
i am posting a diagram of my best running bjt.. probably shouldn't have called it a bjt but i built this circuit thinking about a way to improve the joule thief and this is what i came up with..
as for the bifilar turns. it doesn't seem to matter as long as they don't cancel each other out..
but the bifilar turns do the best job..
very kool! (er)
I would have put things in the wrong places.
Thank you,
;),
jeanna
PS
What is the actual resistance you have there?
I don't want to buy a pot and maybe I can get close if I try what you used.
jeanna
it really depends on the core you use..
if its a 1'' core from goldmine then i would say 1k resistor with a 0.1uf cap
i don't remember the ma's but it was bright light..
i had 8-10 leds in parallel..
i remember 5 months ago i was looking around some junk i have.. and found a center tap transformer it was a 110v to 12v at 500ma..
i hooked one of these circuits to it with a 9volt battery.. very strange.. haha
good luck
robbie
@Kooler and all !
I failed when trying to replicate Kooler's BJT.
Attached are three circuits:
- the one that failed, which is what Kooler suggested in his last post to this thread (Reply #9 on: September 13, 2010, 03:57:17 AM),
- a modified Kooler circuit which worked, but the inductor has no beneficial influence
- and a circuit based on an idea by Groundloop for comparison, where the inductor also has no beneficial influence.
I am not claiming that Kooler's idea does not work, my message is that I could not replicate it.
Greetings, Conrad
kooler have you posted the 16ua circuit? i would like to see it if you dont mind.
Conrad,
I could be wrong here, but I believe the inductors are immediately connected to the battery.
It seems to me that in every one of your examples the inductors are connected to something else.
Try to connect the inductor between the emitter and battery without a cap, , also, between the collector coil and the pos of the battery.
I think that is what is happening, or that is what made me interested. Using a series inductor to make a spike from the toroid, but have it right at the battery to influence the charge.
(maybe I am wrong)
I haven't had a chance to try this yet. I think I will need to wind my own 100uH inductors!
jeanna
@all interested
Ok I have tuned my novel device/toy to where I want it!!!!
I have an oscillator BJT circuit that will power an LED indefin.....well with normal circumstances ;D
The BJT is a Kooler mutation but will run on a 1.5-2.3v mini calculator solar panel as long as the components last.
The solar charges an already charged 2.3v@10F max cap and will light an led (not bright) all day and through the night.
The OSC range is around 20hzs-7Khz output
If you choose to build this please try Koolers easier BJT's as pre-rec because this is very tough to tune!!!!!.....but I built this off his most successful version so use his schematic 8)
I forgot....
Have fun with this amazing circuit 8)
conrad
if the first pic you posted didn't work.. it sounds like you might be using a rf choke instead of a ferrite inductor..
it will take a higher perm ferrite you you want to light off the battery..
i haven't had any luck using the powder iron inductors..
robbie
Quote from: Artic_Knight on September 14, 2010, 03:19:08 PM
kooler have you posted the 16ua circuit? i would like to see it if you dont mind.
artic
i didn't mean to dodge you..
i had a 160ua circuit but the led wasn't bright.. it was noticeable
i have some components here in the house i will see how low i can go with the ma's on the led brightness..
maybe i will be able to post them tonight..
sorry for over looking your post..
robbie
artic
this is for you .. .. and everyone else too..
heres the video.. http://www.youtube.com/watch?v=mKAnwmxs-Ig (http://www.youtube.com/watch?v=mKAnwmxs-Ig)
here is the schematic..
hello sir kooler,
reference bjt4.png
if i show this circuit, so i understand this (as follow)
te 2pcs AA batteries will not ilume the 2 leds by normal DC current 8that wil not flow because voltages to low)
BUT if the whole circui ist oszillating (RF / highfrequencies above 100khz
than the seriell circiut 2leds + 2 batteries, will radiate the rf of this olscillator like an antenna.
2 2 batteries (metall covered) are Antennas ! Are "Ballast" vor the free workink oszillator.
SO the 2 Leds will lightning because an voltage/current (rf) flow over this LED to the radiant Antenna (=batteries)
Gustav Pese
Also other "inventions" that i see in past (last years) was also
"undiscovered" i the principal of working.
here an link collection that i update since 2202
www.alt-nrg.de/pese
contain
german and englisch links
thanks kooler, i figured you just didnt see my post thats why i hit the other forum too :) i appreciate the post, great circuit!
kooler thanks again for posting the circuit, what purpose do the batteries at the bottom serve? are they being charged with one wire? or is that just a mistake/experiment?
thanks
Quote from: kooler on September 17, 2010, 12:40:47 AM
artic
this is for you .. .. and everyone else too..
heres the video.. http://www.youtube.com/watch?v=mKAnwmxs-Ig (http://www.youtube.com/watch?v=mKAnwmxs-Ig)
here is the schematic..
Excellent.
This is a very good demonstration of this circuit.
thanks.
Did you know...
The sound is pretty low on all your videos. I have to squint my ears to hear it.
thank you robbie,
jeanna
Quote from: Artic_Knight on September 17, 2010, 12:30:39 PM
kooler thanks again for posting the circuit, what purpose do the batteries at the bottom serve? are they being charged with one wire? or is that just a mistake/experiment?
thanks
the batteries on the bottom are charging without drawing anymore current from the source battery..
and without taking any voltage from the led..
jeanna
sorry for me talking so low on the video.. i tend to drink at night and my voice gets very low tone..
i am backwards from most other drinkers.. lol
robbie
Hi kooler, I'm finding more and more interest in circuits with an unusual diode arrangement like you have in the circuit above. Thanks for posting that. What transistor are you using in that. Anything special in the way of the diodes by the AAA's ?
I have a suggestion. This topic should be named the BWJT for backwards JT, not to be confused with the BJT which is the basic JT circuit (without a secondary, etc.) as we have been calling it for some time over on the JT topic.
This has caused some confusion although, nothing major. Just a thought.
This really is a great circuit and has wonderful possibilities. I have not built one as of yet but I am going to.
Bill
pirate
sounds good to me ..
can you do that for me.. rename the topic
thanks
robbie
Quote from: kooler on September 19, 2010, 01:49:54 PM
pirate
sounds good to me ..
can you do that for me.. rename the topic
thanks
robbie
Robbie:
Drop a pm to Stefan and ask him to do this. He is the only one that has the ability to do so.
Excellent work on your circuit.
Bill
small video
without the leds on the battery side.. draw is half of what you see..
but i thought the 16 leds on the battery was neat so i showed it..
V - video - V
http://www.youtube.com/watch?v=TgX1gYlmVsk (http://www.youtube.com/watch?v=TgX1gYlmVsk)
robbie
Well robbie,
I guess you got the brightness with 27mA.
Excellent!
jeanna
well jeanna
if i take off the 16 leds off the battery the ma's will go down to 17-18 ma's
i have 3 other circuits that i have built but.. i got one circuit that uses both collector and emitter of a transistor to pulse the transformer..
but i think it would take awhile before people could understand it so i haven't posted it..
there is a few things i have already posted that i should have not because of confusion..
but maybe one day when i am able to get back down to my cellar i can video of some kool stuff..
i have alot of stuff to make videos of once i get better..
robbie
Quote from: kooler on September 22, 2010, 12:06:26 AM
well jeanna
if i take off the 16 leds off the battery the ma's will go down to 17-18 ma's
So you are paying somewhere between 250 and 306 uA to run each led.
I think this is not addressing the question you asked about leds in series.
These appear to be in parallel.
But then, the great thing about this HF circuit is that you CAN use the leds in parallel.
In a standard DC circuit you will blow the one that has only a little less internal resistance.
I am sure we all have seen this with cheap chinese flashlights.
They are sooo bright for a few days, then one led goes bad, then the whole light goes dim.
That sort of thing has not happened to any of my jtc's with lots of parallel leds.
[I probably said this already 4 posts ago, but... oh well. ;)]
thank you,
jeanna
I added a 220uH inductor to the output secondary of a small jtc today. The volts went up from 10-11v to 13v.
Soon, I will add it to the battery spot.
Quote from: jeanna on September 22, 2010, 12:58:33 AM
I think this is not addressing the question you asked about leds in series.
These appear to be in parallel.
But then, the great thing about this HF circuit is that you CAN use the leds in parallel.
In a standard DC circuit you will blow the one that has only a little less internal resistance.
I am sure we all have seen this with cheap chinese flashlights.
They are sooo bright for a few days, then one led goes bad, then the whole light goes dim.
That sort of thing has not happened to any of my jtc's with lots of parallel leds.
I added a 220uH inductor to the output secondary of a small jtc today. The volts went up from 10-11v to 13v.
Soon, I will add it to the battery spot.
yea i bought some china led flashlites for work months ago and they would run thru batterys so i thought i would check the draw and it was over 100ma's..
where you get your your 220uh inductors..
i don't remember asking about leds in series..
i put a trigger coil across my secondarys once and it pushed it up by 12 volts..(the primany side of the coil)
i was looking thru my notes yesterday and noticed i have a circuit built close to this one..
but i will name it something weird and post it somewere else.. it doesn't have a resistor.. unlike this one.. (bwjt)
well have a good nite..
out,
robbie
i was playing with a flyback so i tried this circuit on it ..
only to find that it lit a neon dim at 1.1 volts and 0.16 ma's..
hmmmmmm.. what else can i use this for..
http://www.youtube.com/watch?v=wav6mvzUdZs (http://www.youtube.com/watch?v=wav6mvzUdZs)
robbie
blah,blah,blah.. .. .. .. .. ..
http://www.youtube.com/watch?v=4Nj_azGazLw (http://www.youtube.com/watch?v=4Nj_azGazLw)
i might have the led backwards .. i cant remember
Quote from: kooler on February 18, 2011, 11:44:11 PM
blah,blah,blah.. .. .. .. .. ..
http://www.youtube.com/watch?v=4Nj_azGazLw (http://www.youtube.com/watch?v=4Nj_azGazLw)
Nice job Kooler,
My version was right around the same input and draw but your led is blinking much brighter. Keep it up!
oops.. it looks like i modded the hartley circuit and renamed it .. sorry guys..
hi kooler, you thief, lol, jk. :D
Still is an interesting circuit. What you posted, does that transmit to the other hartley circuit and the speaker makes a tone sound i assume.
I hope this doesn't mean your giving up on messing with this type of circuit, never know what other things it could reveal.
peace love light
Tyson ;)
nah.. i will still be using it in my circuits.. but i will call it what it really is.. since i was able to find it..
what you see in the picture from the radioshack book is two different version of the circuit..
they said that these two were the very basic version of the hartley circuit..
so i reckon i am a backwards joule thief.. lol ;D
i got two other circuits i made along time ago.. so i been looking to see if someone else already has a name for them before i release them.. haha.. cause looking like a thief for the second or third time will look like a habit.. :'( lol
i bought some very low drop out voltage regulators (0.4 volt ) so i will probably try jonny davro circuit next..
but if you have any questions on this circuit i will answer to my fullest knowledge.. which isn't much but might help..
robbie
Great work guys!
I would have never been able to get I2C bus communication with my microcontroller oscillators , or my PWM robotics circuits working if I hadn't played with Joule Thiefs.
So don't listen to anyone tell you you're wasting your time with these -- by the way, thanks for posting that schematic.... those are from the Radio Shack project guides, right?
Quote from: Feynman on March 02, 2011, 01:54:44 PM
So don't listen to anyone tell you you're wasting your time with these -- by the way, thanks for posting that schematic.... those are from the Radio Shack project guides, right?
He's right. They've been around for a long time. I lost mine when I moved and they may be out of print? They don't print them like that any more, AFAIK.
--Lee
well now i just read in a different book that any circuit that runs from 30 khz and up - - -
is a hartley osc.. if it has a dual coil and one transistor.. (aircoil)
so i don't know any more..
but yes that is a radio shack guide.. that i downloaded from somewere..
it sux that radioshack don't still run there biz the same way they did back in the 80's-90's but i reckon times change .. for the worse or good..
i am still trying to find the perfect oscillator for my device.. before i release it to public..
hoping soon..
and for whom ever is trying to get in to me i not using a firewall its a self wrote p2p program..
try python and you might figure it out.. (u know who u r .. hint u.k )
if i can help .. let me know..
robbie
Preliminary measurements may indicate Joule Thief has COP>1. (COP = 1.08 to 1.4 somewhere). Results pending community assessment and further confirmation.
http://www.overunityresearch.com/index.php?topic=717.msg11577#msg11577
well..
i found this in the 1-100 TransistorCircuits.pdf its on page 25..
Hum ...
wow..
that is a small one.. be kool if we could build Exciter's that small..
haha..
robbie
@kooler
I had i idea , you Hartley circuit works from barely nothing , maybe it could run on a crystal radio set .
Now imagine the crystal radio set tuned to the Hartley circuit , feed back loop no wire ...
Obviously the crystal set may need to be tuned on a real radio station , but you could make more then one receiver and get more current .
Mark
http://www.youtube.com/user/Lidmotor#p/f/12/gcui0K7JZXA
Quote from: Mk1 on April 07, 2011, 05:11:56 PM
@kooler
I had i idea , you Hartley circuit works from barely nothing , maybe it could run on a crystal radio set .
Now imagine the crystal radio set tuned to the Hartley circuit , feed back loop no wire ...
Obviously the crystal set may need to be tuned on a real radio station , but you could make more then one receiver and get more current .
Mark
http://www.youtube.com/user/Lidmotor#p/f/12/gcui0K7JZXA
run this circuit thru air i noticed it is very lot of lost..
but with certain high tension transformers.. i have got 1026 volts with only 1.1 volts input at 160 microamps..
of course it is very low current.. i can only see that voltage with a scope.. but it will lite a couple neon bulbs up..
but no cfl.. but it does seem to charge and revitalize batterys alot better than some other devices we have built in the past..
if you want i will make a small schematic of my better setup that is similar to the hartley circuit.. that will run some trigger coils and diodeless flybacks.. and handmade transformers..
i been mostly working on what i discovered back in dec. 29. 2009.. when i have the spare time.. !
with all the problems i have been having the past and current year.. i been trying to spend most of my time with my kid and wife..
but things are looking up.. and its all because of b vitamins and hydrogen peroxide..h202 inhaling a mist is a must for everybody..
once i start to feel better i will do more videos on some stuff.. i been sleeping 12 hours just so i can work a full 8 hour day..
but i will start doing more soon i hope.. if not i will see you on the other side..
keep up the good work ..
robbie